Demagnetization of iron-neodymium-boron type permanent magnets w

Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials

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148120, 148121, H01F 102

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049003747

ABSTRACT:
Hot worked, fine grain, permanent magnets of the iron-neodymium-boron type can be demagnetized by heating in air for a period of minutes at a temperature in the range of 100.degree. C. to 300.degree. C. above their Curie temperature without significant loss of coercivity.

REFERENCES:
patent: 4792367 (1988-12-01), Lee
patent: 4802931 (1989-02-01), Croat

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